Improvement in sectional steam-generators



JoHN J. EoEPEn, or PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SECTINAL STEAM-GENERATORS.

Specication forming part of Letters Patent' No. 146,476, dated January13, 1874; application tiled December 13, 1873.

To all whom it may concern:

Beit known that I, J orIN J. RoErER, of the city and county ofPhiladelphia, State of Penn sylvania, have invented an Improved Steam-Generator, of which the following is a speciiication: i

The object of my invention is a cast-iron steam-generator which presentsan extended heatingsurtace, and which can be readily increased incapacity, the said generator consisting of two exterior cast-ironsections, A and A', and any desired number oi' interlinediate sections,B, constructed, and adapted, and

secured to each other, as shown in the vertical section, Figure l, andside view, Fig. 2, of the accompanying drawing.

The exterior sections A and A are, with the exception of being maderight and left, precisely alike, each ot' these sections inclosing aspace devoted to water and steam in the usual proportions. Theseexterior sections are carried lower down than the intermediate sections,in the present instancefso as to leave a space, D, which is open to thefire-place below, the products of combustion passing along this space.,then returning through passages a a,

` formed by recessing adjoining sections, and

then turning and traversing similar passages bl b,communioating with thechimney. There may, it desired, be one or more additionalreturn-passages for the products of combustion situated above andcommunicating with the rator. When the boiler is in use, the en trancesto these transverse tubes may be iitted with plugs e e, which can bewithdrawn for the introduction of a suitable instrument for cleansingpurposes. The lower portion or leg of each of the outer sections A and Ahas re cesses f at suitable intervals for the purpose oi' adding to thestrength of these legs, and also for increasing the heating-surface. Ipropose in some instances, however, to dispense with these legsaltogether, and to make all of the sections of the boiler of the samelength. Rows of larger tubes h are cast across the upper portion of eachslab or section for the same purpose, the tubes of one sectioncommunicating with those of the other, as shown in Fig. 1. These lattertubes may main open for the passage of air, which, becoming heated, maybe used for warming buildings in the neighborhood of the boiler.` Theinterior of the several sections communicate with each other at twopoints only-that is, at the upper point m., a transverse section oi'which is shown in Fig. 3, and at the lower point a, a transverse sectionof which is shown in Fig. 4, the sections being secured together atthese two points by boltsi '11. At the point m, where the steam-spacesof all the sections communicate, maybe situated the safety-valve and theshut-oli' valve-chest, with which the steam-pipe communicates, and atthe lower point n the feed-pipes should communicate with all thesections simultaneously.

It will be seen that the capacity of the generator can be readilyincreased by increasing the number oi intermediate sections, and thatthis addition can be readilyT accomplished.

I claim as my inventionl. A steam-generator, consisting of exteriorsections A A and intermediate sections B, each section having tluesformed by recessin g adjoining sect-ions, as set forth.

2. The combination of the tlues a a and I) b, form ed by recessin gintermediate sections,with the transverse tubes cl and d cast in eachsection, all as speciiied.

In testimony whereof I have signed my name tothis specification in thepresence of two subscribin g witnesses.

JOHN J. ROEPER,

Witnesses WM. A. STEEL, J. SHERBORNE SINGER.

